doris riedl <doris(dot)riedl(at)univie(dot)ac(dot)at> writes:
> I have a postgres version 7.4.
> Today I overwrote some data with an update statement, but only saw it after
> I quit the database.
> Can I use WAL to get back the data? - I know the time of my failure up to
> one minute exact.
Nope, the infrastructure to do that didn't exist before PG 8.0, and even
then it requires keeping backups that you don't have. Sorry ...
regards, tom lane